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Margy is trying to improve her cardio endurance by performing an exercise in which she alternates walking and running 100.0 m each. If Margy is walking at 1.4 m/s and accelerates at 0.20 m/s2 during one of the running portions, what is her final velocity at the end of the 100.0 m? Round your answer to the nearest tenth. m/s

Respuesta :

lublana

Answer:

6.5 m/s

Explanation:

We are given that

Distance, s=100 m

Initial speed, u=1.4 m/s

Acceleration, [tex]a=0.20 m/s^2[/tex]

We have to find the final velocity at the end of the 100.0 m.

We know that

[tex]v^2-u^2=2as[/tex]

Using the formula

[tex]v^2-(1.4)^2=2\times 0.20\times 100[/tex]

[tex]v^2-1.96=40[/tex]

[tex]v^2=40+1.96[/tex]

[tex]v^2=41.96[/tex]

[tex]v=\sqrt{41.96}[/tex]

[tex]v=6.5 m/s[/tex]

Hence, her final velocity at the end of the 100.0 m=6.5 m/s

dennairio37

Answer:

6.5

Explanation:

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